Enable ClangTidy for Dawn.

Change-Id: Id9d6535ef8b6d92d96fd52f3ad805696ad1f657a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/766639
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
6 files changed